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6267 Rozhen, provisional designation 1987 SO₉, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 3 kilometers in diameter. In 1987, the asteroid was discovered by Eric Elst at Rozhen Observatory, Bulgaria, and was later named after the discovering observatory.

Discovery

Rozhen was discovered on 20 September 1987, by Belgian astronomer Eric Elst at Rozhen Observatory near Smoljan, Bulgaria. For four days, between 27 and 31 January 2005, the body was briefly and erroneously renamed 6267 Smolyan. In November 1949, a precovery was taken at Palomar Observatory, extending the body's observation arc by 38 years prior to its official discovery observation at Rozhen.

Orbit and classification

The S-type asteroid is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun in the inner main-belt at a distance of 2.0–2.4 AU once every 3 years and 2 months (1,161 days). Its orbit has an eccentricity of 0.09 and an inclination of 2° with respect to the ecliptic.

Physical characteristics

Lightcurves

In January 2014, two rotational lightcurves of Rozhen were obtained from photometric observations at the Palomar Transient Factory in California, United States. They gave a rotation period of 3.9847 and 3.980 hours with a brightness variation of 0.14 and 0.12 magnitude, respectively (U=2/2).

Diameter and albedo

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24, derived from 8 Flora, the asteroid family's largest member and namesake, and calculates a diameter of 3.0 kilometers with an absolute magnitude of 14.77.

Naming

This minor planet was named for the discovering Rozhen Observatory, also known as the "Bulgarian National Astronomical Observatory", that has been established at Rozhen in 1981.

Rozhen is located near the city of Smoljan and in proximity to the border with Greece. At 1700 meters above sea leavel, the observatory benefits from favorable instrumental and observational conditions. An exhaustive survey for the discovery of minor planets was launched at Rozhen in 1986. The approved naming citation was published by the Minor Planet Center on 20 November 2002 (M.P.C. 47163).

References

1. ^ "JPL Small-Body Database Browser: 6267 Rozhen (1987 SO9)" (2017-03-14 last obs.). Jet Propulsion Laboratory. Retrieved 21 June 2017.
2. ^ Schmadel, Lutz D. (2007). "(6267) Rozhen". Dictionary of Minor Planet Names – (6267) Rozhen. Springer Berlin Heidelberg. p. 522. doi:10.1007/978-3-540-29925-7_5763. ISBN 978-3-540-00238-3.
3. ^ "LCDB Data for (6267) Rozhen". Asteroid Lightcurve Database (LCDB). Retrieved 4 July 2016.
4. ^ Chang, Chan-Kao; Ip, Wing-Huen; Lin, Hsing-Wen; Cheng, Yu-Chi; Ngeow, Chow-Choong; Yang, Ting-Chang; et al. (August 2015). "Asteroid Spin-rate Study Using the Intermediate Palomar Transient Factory". The Astrophysical Journal Supplement Series. 219 (2): 19. arXiv:1506.08493. Bibcode:2015ApJS..219...27C. doi:10.1088/0067-0049/219/2/27. Retrieved 4 July 2016.
5. ^ Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 4 July 2016.
6. Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 4 July 2016.
7. ^ "6267 Rozhen (1987 SO9)". Minor Planet Center. Retrieved 4 July 2016.
8. "Major News about Minor Planets". hohmanntransfer.com. 28 February 2005. Retrieved 1 January 2016.
9. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 4 July 2016.

External links

• 6267 Rozhen (1987 SO9) was renamed 6267 Smolyan
• Asteroid Lightcurve Database (LCDB), query form (info)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
• 6267 Rozhen at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 6267 Rozhen at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

• Minor planet object articles (numbered)
• Flora asteroids
• Discoveries by Eric Walter Elst
• Named minor planets
• Astronomical objects discovered in 1987